Specially made, or selected, to give an attractive appearance to a building. Engineering Bricks: Fired clay bricks, having a dense and strong semi-vitreous body, conforming to defined limits for water absorption and compressive strength. Soft Mud Bricks: The most economical, burned at high temperature to achieve strength. Uses of Brick In metallurgical and glass industry for lining furnaces. Used as a refractory (silica